Remember when you could destroy weeds, clean up edges and trim grass all with one versatile machine? Replace the string in your WEN 40413 40V Lithium-Ion String Trimmer with our WEN Replacement String Spool. This auto-feed string measures in at .065 inches in diameter (1.6 mm). Combine that with the dense nylon makeup for a reliable replacement spool that slices right through even the toughest of foliage. Our quick-install head makes for easy changes while the two-line feed doubles the efficiency for every rotation. Total length of string adds up to over 30 feet, making sure users are spending time cutting grass and not changing spools. Remember when your yard was the talk of the town? Remember WEN.